Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| 碱性木质素对玉米秸秆成型特性的影响 | |
| Alternative Title | Effect of Alkali Lignin on Corn Stalk Pelleting Process |
李伟振1,2,3 ; 姜洋1,2,3; 饶曙4; 阴秀丽1,2,3; 蒋恩臣4
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| 2017-12 | |
| Source Publication | 林产化学与工业
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| ISSN | 0253-2417 |
| Volume | 37Issue:6Pages:35-42 |
| Abstract | 为了研究碱性木质素对玉米秸秆成型特性的影响及其软化黏结作用,以玉米秸秆为原料进行压缩成型,考察添加碱性木质素对成型效果的影响。结果表明：碱性木质素能够促进成型,改善成型效果,当添加量由0提高到20%时,玉米秸秆成型颗粒的松弛密度由1 005 kg/m3增大到1 157 kg/m3,径向最大抗压力由1 353 N增大到1 930 N。采用DSC对玉米秸秆和碱性木质素的热转变特征温度进行了研究,结果表明：玉米秸秆和碱性木质素的玻璃态转变温度分别在92.5~103℃、61~137℃之间；在玻璃态转变过程中,100℃时存在比能耗最低点；100~130℃为碱性木质素起较好黏结作用的温度范围。采用SEM对颗粒微观形态进行观察,发现碱性木质素发生玻璃态转变后在颗粒内部能够形成“局部熔融”和“机械互锁”两种结合形式,适合的碱性木质素添加量为10%~15%。 |
| Other Abstract | In order to study the effect of alkali lignin on corn stalk pelleting process and the bonding mechanism, the influences of four parameters (alkali lignin adding amount, temperature, moisture and pressure ) on three technical indicators (relaxed density, radial compressive strength and specific energy consumption) were investigated. The compression molding experiment showed that when alkali lignin adding amount increased from 0 to 20%, the relaxed density of corn stalk pellets increased from 1 005 kg/n~ to 1 157 kg/m3 and the radial compressive strength increased from 1 353 N to 1 930 N. This results suggested that increasing of alkali lignin could promote the corn stalk pelleting process. The thermal transition temperatures of corn stalk and alkali lignin were also studied by differential scanning calorimetry (DSC). The results showed that the glass transition temperatures of corn straw and alkali lignin were between 92. 5 - 103 ℃ and 61 - 137 ℃, respectively. In the thermal transition temperature range, 100 ℃ was the lowest specific energy consumption with suitable moisture content. The suitable temperature range for alkali lignin bonding was I00 - 130 ℃. The microstructure of pellets showed that alkali lignin occurred melting transition after melting temperature and then formed ' molten combination' and ' mechanical interlocking' inside the particles. The suitable alkali lignin adding amount for bonding was 10% - 15%. |
| Keyword | 压缩成型 碱性木质素 黏结机理 比能耗 热转变温度 微观形态 pelleting alkali lignin bonding mechanism specific energy consumption thermal transition microstructure |
| DOI | 10. 3969 /j. issn. 0253-2417. 2017. 06. 005 |
| Language | 中文 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/16605 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | 姜洋 |
| Affiliation | 1.中国科学院广州能源研究所，广东广州510640; 2.中国科学院可再生能源重点实验室，广东广州510640; 3.广东省新能源和可再生能源研究开发与应用重点实验室，广东广州510640; 4.华南农业大学材料与能源学院，广东广州510642 |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | 李伟振,姜洋,饶曙,等. 碱性木质素对玉米秸秆成型特性的影响[J]. 林产化学与工业,2017,37(6):35-42. |
| APA | 李伟振,姜洋,饶曙,阴秀丽,&蒋恩臣.(2017).碱性木质素对玉米秸秆成型特性的影响.林产化学与工业,37(6),35-42. |
| MLA | 李伟振,et al."碱性木质素对玉米秸秆成型特性的影响".林产化学与工业 37.6(2017):35-42. |
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